Adaptive traffic signal preemption
First Claim
1. A method of processing traffic signal priority requests, comprising:
- receiving at an intersection, a traffic signal priority request from a vehicle;
determining a number of stopped vehicles at the intersection and on an approach to the intersection in response to receiving the priority request;
computing an activation threshold as a function of an estimated-time-of-arrival (ETA) threshold and the number of stopped vehicles;
determining a vehicle ETA of the vehicle at the intersection in response to the priority request;
submitting, in response to the vehicle ETA being less than the activation threshold, the priority request for preemption service processing at the intersection; and
bypassing, in response to the vehicle ETA being greater than the activation threshold, submission of the priority request for preemption service processing at the intersection.
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Accused Products
Abstract
The disclosed approaches for processing traffic signal priority requests include receiving traffic signal priority requests from a vehicle. The number of stopped vehicles at the intersection and on an approach to the intersection is determined in response to receiving each priority request. An activation threshold is computed as a function of an estimated-time-of-arrival (ETA) threshold and the number of stopped vehicles. A vehicle ETA of the vehicle at the intersection is determined in response to each priority request. In response to the vehicle ETA being less than the activation threshold, the priority request is submitted for preemption service processing at the intersection. In response to the vehicle ETA being greater than the activation threshold, submission of the priority request is bypassed for preemption service processing at the intersection.
36 Citations
20 Claims
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1. A method of processing traffic signal priority requests, comprising:
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receiving at an intersection, a traffic signal priority request from a vehicle; determining a number of stopped vehicles at the intersection and on an approach to the intersection in response to receiving the priority request; computing an activation threshold as a function of an estimated-time-of-arrival (ETA) threshold and the number of stopped vehicles; determining a vehicle ETA of the vehicle at the intersection in response to the priority request; submitting, in response to the vehicle ETA being less than the activation threshold, the priority request for preemption service processing at the intersection; and bypassing, in response to the vehicle ETA being greater than the activation threshold, submission of the priority request for preemption service processing at the intersection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for processing traffic signal priority requests, comprising:
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a priority request receiver configured and arranged to receive the priority requests; a data collector configured and arranged to provide data indicative of vehicles at an intersection; a processor coupled to the priority request receiver and to the data collector; a memory coupled to the processor, wherein the memory is configured with instructions that when executed by the processor cause the processor to; receive at the intersection, a traffic signal priority request of the traffic signal priority requests from a vehicle; determine a number of stopped vehicles at the intersection and on an approach to the intersection in response to receiving the priority request and using the data indicative of vehicles at an intersection; compute an activation threshold as a function of an estimated-time-of-arrival (ETA) threshold and the number of stopped vehicles; determine a vehicle ETA of the vehicle at the intersection in response to the priority request; submit, in response to the vehicle ETA being less than the activation threshold, the priority request for preemption service processing at the intersection; and bypass, in response to the vehicle ETA being greater than the activation threshold, submission of the priority request for preemption service processing at the intersection. - View Dependent Claims (18, 19, 20)
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Specification